Trafalgar's Hot and Cold Packs can be used as both an ice pack and heat pack. The soft pack easily to contours to most parts of the body providing a therapeutic relief. Each pack contains 2x reusable hot and cold packs and towelling sleeve. Hot Compress You can either heat it up in hot water or the microwave for your convenience. Suitable for muscular aches, menstrual pain, body stiffness, rheumatism and strains. Cold Compress Simply put it in the freezer for at least 1 hour and it's ready to use. Suitable for headaches, migraines, bruising, swelling, sprains and tooth aches